CPA Theory of Superconducting Alloys with Diagonal and Off-Diagonal Disorder

• Authors: M. Michalik , K. Wysokiński
• Languages of publication: EN

Abstracts

EN

The general theory of disorder in superconducting alloys was discussed. We use standard Wannier function representation and allow for diagonal and off-diagonal disorder. We generalized the coherent potential approximation in the version able to deal with off-diagonal disorder in normal systems to treat superconducting state. As an illustration we calculate the quasiparticle density of states and gap function of a d-wave superconductor. We show inter alia that the rate at which superconductivity disappears depends on the kind of disorder and for off-diagonal disorder it depends on the details of its realization.

Keywords

EN

71.10.-w; 71.23.-k; 74.20.-z

Discipline

• 74.20.-z: Theories and models of superconducting state
• 71.10.-w: Theories and models of many-electron systems
• 71.23.-k: Electronic structure of disordered solids

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 5
• Pages: 653-658

Dates

published

2004-11

received

2004-06-06

Contributors

author

M. Michalik

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

K. Wysokiński

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

References

• 1. J.G. Bednorz, K.A. Muller, Z. Phys. B, 64, 89, 1986; B. Brandow, Phys. Rep., 296, 1, 1998
• 2. L.P. Gorkov, P.A. Kalugin, Pis'ma Zh. Eksp. Theor. Fiz., 41, 208, 1985, [JETP Lett., 41, 253, 1985]
• 3. R. Fehrenbach, Phys. Rev. Lett., 77, 1849, 1996
• 4. D.F. Agterberg, Phys. Rev. B, 60, R749, 1999
• 5. K.I. Wysokiński, A.L. Kuzemsky, J. Low Temp. Phys., 52, 81, 1983
• 6. A.A. Nersesyan, A.M. Tsvelik, F. Wenger, Phys. Rev. Lett., 72, 2628, 1994
• 7. A.M. Martin, G. Litak, B.L. Gyorffy, J.F. Annett, K.I. Wysokiński, Phys. Rev. B, 60, 7523, 1999
• 8. J.A. Blackman, D.M. Esterling, N.F. Berk, Phys. Rev. B, 4, 2412, 1971
• 9. M. Michalik, K.I. Wysokiński, Phys. Status Solidi B, 236, 372, 2003
• 10. Ch. Renner, B. Revaz, J.Y. Genoud, K. Kadowaki, O. Fischer, Phys. Rev. Lett., 80, 149, 1998
• 11. A. Romano, C. Noce, R. Micnas, Phys. Rev. B, 55, 12640, 1997
• 12. M. Michalik, K.I. Wysokiński, in preparation

Identifiers

DOI

10.12693/APhysPolA.106.653